Abstract: Based on the mechanism of alkane hydroisomerization and lube hydroisomerization dewaxing, the influence of properties of molecular sieve on the performance of hydroisomerization catalyst was investigated, the ZIP sieve with high activity and hydroisomerization selectivity was selected as acidic component of the new developed dewaxing catalyst RIW-2. At the same pour point, the yield of base oil for RIW-2 is much higher than that of the first generation catalyst RIW-1. RIW-2 can be used in the dewaxing of many kinds of waxy feedstocks to produce high viscosity index base oils, and can produce API III+ base oils.

Key words: lube, hydroisomerization dewaxing, catalyst, molecular sieve, RIW-2